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    <title>Document</title>
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                   <h1>桂林旅行社</h1>
                    <ul>
                        <li class="active"><a href="#">首页</li></a>
                        <li><a href="#">旅游资讯</li></a>
                        <li><a href="#">机票订购</li></a>
                        <li><a href="#">风景欣赏</li></a>
                        <li><a href="#">公司简介</li></a>
                    </ul>
                </section>
            </nav>
            <header>header</header>
            <section>body</section>
            <footer>footer</footer>
</body>
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